24CW640T-I/Q4B

Memory IC Overview

The Microchip Technology 24CW640T-I/Q4B is a 64 kbit (8 k x 8) serial electrically erasable programmable read-only memory (EEPROM). It utilizes an I2C interface with a maximum clock frequency of 1 MHz. The device operates within a supply voltage range of 1.6 V to 5.5 V and features software write protection. It is housed in an UDFN-8 package, supports surface mount installation, and maintains data retention for 200 years. The component functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports I2C serial communication with software-based write protection mechanisms
• Operates across a wide supply voltage range from 1.6 V to 5.5 V
• Designed for industrial temperature environments ranging from -40°C to +85°C

Memory IC Applications

• Industrial control systems requiring non-volatile data storage
• Consumer electronics utilizing low-voltage power supplies
• Embedded systems needing reliable parameter retention

Memory IC Procurement Notes

Verify the specific suffix Q4B corresponds to the required tape and reel packaging configuration. Confirm that the industrial temperature grade (-40°C to +85°C) aligns with the operational environment requirements. Ensure the I2C address configuration matches the system design constraints before integration.

Memory IC Selection Notes

Select this component when a 64 kbit capacity is required alongside standard I2C compatibility. The 1.6 V minimum operating voltage makes it suitable for battery-powered or low-voltage applications. The UDFN-8 package offers a compact footprint for space-constrained designs compared to larger EEPROM options.

Memory IC Part Context

This part belongs to the Microchip 24CW series of serial EEPROMs. It shares the same pinout and interface protocol as other capacities in the family, such as the 24CW160 and 24CW320, facilitating scalable design architectures while maintaining consistent software drivers across different memory sizes.

Memory IC Replacement Considerations

Direct functional substitutes include the 24CS64T-I/Q4B, which offers similar capacity but operates at higher speeds up to 3.4 MHz. For lower capacity needs, the 24CW320T-I/Q4B provides a compatible alternative with half the storage density.